Abstract #3696

Tailored 3D Inner Volume Suppression Pulses for MR Corticography

Jun Ma¹, Xinqiang Yan², Bernhard Gruber³, Jonathan Martin¹, Zhipeng Cao², Jason Stockmann³, Kawin Setsompop³, and William Grissom¹

¹Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, ²Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, United States, ³Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States

To fully utilize the potential of a new cortical imaging-optimized 7T scanner with G_max= 200 mT/m & S_max=700 T/m/s gradients, 128 Rx channels, 16 Tx channels, and an AC/DC B₀ shim array, we describe a tailored parallel transmit inner-volume-suppression (IVS) pulse design, which can enable highly accelerated functional and diffusion imaging by reducing g-factor and suppressing physiological noise from ventricle CSF. 3D IVS pulses were designed using simulated B₁⁺ maps for the scanner’s 24-element coil. Simulation results demonstrated uniform inner volume suppression for 3D and 2D imaging. A 2D in-vivo IVS pulse design experiment demonstrated IVS’s ability to reduce g-factor.

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